Replace the 20 year old water heater. It's past its life span. They now make more energy effecient water heaters which will lower your utility bill. Put a blanket around the new water heater while you're at it.
A light period is a menstrual cycle that is shorter and/or lighter than a woman's regular period. Women should familiarize themselves with their menstrual cycle, how many pads or tampons they use, and how long their periods last to quickly detect any changes in their periods.
LIGHT. Light is ELECTROMAGNETIC RADIATION in the wavelength range extending from about 0.4 micron to about 0.7 micron; or, perhaps more properly, the visual response to electromagnetic radiation in this range.